Disney Direct reservation number?

[diddldonna]

Hi i booked a holiday through disney direct and got a ref code which i can use on the international site to see my booking.

I made dining reservations to the usa site and you can link your hotel reservation to be able to book before others and use the booking instead of handing other credit details for some reservations but my code that works on the international one doesnt allow me to log in on the usa on?